[IC]：A7139
[Frequency]：425~470MHz
[Power]： 20dBm
[Distance] : 2km
[Size]：20*14mm
[Introduction]：E41-400M20S is an ultra-high cost-effective wireless data transmission module launched by Ebyte. It is based onAMICCOM's A7139 radio frequency chip, and it has the characteristics of small size and low power consumption.
Limit Parameters
| Main Parameters | Value | Remarks | |
| Min. | Max | ||
| Power supply（V） | 2.5 | 3.6 | Over 3.6V, the module will be burned |
| Operating temperature（℃） | -40 | +85 | Industrial grade |
Operating parameter
| Main Parameters | Value | Remarks | ||
| Min. | Typical | Max | ||
| Working Voltage (V) | 2.5 | 3.3 | 3.6 | Over 3.6V, the module will be burned |
| Communication level（V） | - | 3.3 | - | - |
| Working temperature (℃) | -40 | - | 85 | Industrial design |
| Working frequency（MHz） | 425 | 433 | 470 | - |
| TX Current(mA) | - | 150 | - | Instantaneous value @ 20dBm |
| RX current（mA） | - | 3.8 | - | - |
| Sleep current（μA） | - | 2.0 | - | Sleep status |
| Max Tx power（dBm） | - | 20 | - | - |
| Receiving sensitivity（dBm） | -113 | -114 | -115 | Air rate @ 2 kbps |
| Main parameter | Description | Remarks |
| Reference distance | 2 km | Clear and open environment, antenna gain 5dBi, antenna height2.5m, air rate 2kbps |
| Crystal frequency | 12.8 MHz | - |
| Package | SMD | - |
| Chip model | A7139/QFN24 | - |
| Communication Interface | SPI | - |
| Dimensions | 20*14 mm | - |
| RF interface | IPEX/Stamp hole | Impedance is 50 Ω |
| Weight | 1.3±0.1g | - |
| No. | Pin | Direction | Description |
| 1 | GND | - | Ground |
| 2 | GND | - | Ground |
| 3 | GND | - | Ground |
| 4 | GND | - | Ground |
| 5 | GND | - | Ground |
| 6 | SCS | DI | SPI chip select pin |
| 7 | SCK | DI | SPI clock pin |
| 8 | SDIO | DI/O | SPI data pin |
| 9 | GND | - | Ground |
| 10 | GND | - | Ground |
| 11 | VCC | - | Power supply, connects to power supply +3.3V |
| 12 | GPIO1 | DI/O | Configurable multi-function IO port (seeA7139 manual for details) |
| 13 | GPIO2 | DI/O | Configurable multi-function IO port (seeA7139 manual for details) |
| 14 | GND | - | Ground |
| 15 | GND | - | Ground |
| 16 | GND | - | Ground |
| 17 | ANT | - | Antenna stamp hole interface, impedance is 50Ω |
| 18 | GND | - | Ground |
| Order online |
| 【eBay】：https://www.ebay.com/usr/cdebyte |
| 【Aliexpress】：https://www.aliexpress.com/store/2798183 |
| 【Alibaba】：https://www.alibaba.com |
| For batch order/customized product |
| 【Sales hotline】：+86-28-61399028 Ext.812 |
| 【E-mail】：service@cdebyte.com |
| Technical support |
| 【Submit online】：http://www.ebyte.com/en/apple-technology.aspx |
| 【E-mail】：support@cdebyte.com |
| Model | IC | Interface | Frequency Hz | Power dBm | Distance km | Air data rate | Package | Size (mm) | Feature | Manual | Sample |
|---|---|---|---|---|---|---|---|---|---|---|---|
| E41-400M20S | SPI | A7139 | 433/470M | 20 | 2 | 2k～250k | 贴片 | 20*14 | Super cost-effective, low power consumption | ||
| E41-433T10S | UART | - | 433M | 10 | 1.0 | 2k~15k | SMD | 17*30 | Low cost , WOR | ||
| E41-433T20S | UART | - | 433M | 20 | 2.0 | 2k~15k | SMD | 17*30 | Low cost , WOR |
